Marmora is a pretty unique area as far as Ontario caving goes, there are so many possibilities and few have been pushed to their “doable extent”. I have long suspected that there must be some deeper trunk passages beneath the sinking channel around where most of my investigations have taken place. I also suspect the existance of undiscovered tunnels deeper inland; underneath a high forested ridge.
Looking up this tunnel, the prospect is a daunting belly crawl across the slushy ice. Eventually the explorer finds their way blocked by frozen pillars that have oozed from the roof. There is a maze of interconnecting passages around here and it was a somewhat challenging exploration under these conditions.
For further information on the caving and hiking possibilities in Marmora, check out my book, “Rockwatching; Adventures Above and Below Ontario”. You should find a copy in your local bookstore.
NOTE: Some might recognize this picture from an earlier post but unfortunatly, I had deleted it, I was not clear about how Flickr worked at the time.